#3F4D8A#3F4D8A

#3F4D8A is a dark, moderate blue. Relative luminance 0.082; OKLCH L 43.9% C 0.102 H 271.9°. Best body text is #FFFFFF at 7.96:1 contrast (WCAG AA passes).

Color values

HEX	#3F4D8A
RGB	rgb(63, 77, 138)
HSL	hsl(229, 37%, 39%)
HSV	hsv(229, 54%, 54%)
CMYK	cmyk(54.3%, 44.2%, 0%, 45.9%)
CIE-LAB	lab(34.39, 13.10, -35.80)
CIE-LCH	lch(34.39, 38.12, 290.10°)
OKLab	oklab(43.92% 0.0034 -0.1016)
OKLCH	oklch(43.92% 0.102 271.9)
XYZ	xyz(9.2897, 8.1989, 25.1328)
Luminance	0.0820 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4D8A #8A7C3F

analogous

#3F738A #3F4D8A #573F8A

triadic

#3F4D8A #8A3F4D #4D8A3F

tetradic

#3F4D8A #8A3F73 #8A7C3F #3F8A57

square

#3F4D8A #8A3F73 #8A7C3F #3F8A57

split-complementary

#3F4D8A #8A573F #738A3F

monochromatic

#191E36 #2C3660 #3F4D8A #5566B1 #7F8CC5

Accessibility & contrast

On white

7.96

#3F4D8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#3F4D8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4D8A

7.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4D8A	#FFFFFF	#000000	##FFFFFF
##3F4D8A	1.00	7.96	2.64	7.96
#FFFFFF	7.96	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#33548C

Deuteranopia (green-blind)

#2B4E89

Tritanopia (blue-blind)

#1B5A64

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3f4d8a;
/* rgb */ color: rgb(63, 77, 138);
/* oklch */ color: oklch(43.9% 0.102 271.9);

Tailwind

colors: {
  custom: {
    50: '#7a7eac',
    500: '#3f4d8a',
    950: '#000000',
  },
}

SCSS

$custom: #3f4d8a;
$custom-light: #7a7eac;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4d8a",
  "rgb": {
    "r": 63,
    "g": 77,
    "b": 138
  },
  "hsl": {
    "h": 228.8,
    "s": 37.313,
    "l": 39.412
  },
  "oklch": {
    "l": 0.43924,
    "c": 0.10171,
    "h": 271.9
  },
  "luminance": 0.08199
}

Semantic roles & 50–950 ramp

primary

#3F4D8A

secondary

#AFA476

accent

#B85BCD

background

#F7F7FA

surface

#EEEEF4

border

#C9C9CE

text

#090910

muted

#7B7B7F

Preview Lab

Preview with #3F4D8A

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →